Monitoring an apache/passenger puppetmaster setup?

[Christopher Wood]

How do you monitor your apache/passenger-fronted puppetmaster to find out when it's down?

As backstory, we have a chaos monkey sort of cron job randomly kill-9'ing random processes and monit checking services to make sure they stay up. (Sadly the chaos monkey part probably won't make it into production.)

The puppet agent seems to exit with a 0 status in some circumstances where the puppetmaster isn't working, therefore doing a test noop agent run doesn't help. So far the only way I've figured out to check if my puppetmaster service is purportedly functioning is:

[root@cwt1 ~]# cat /usr/local/sbin/monit-check-passenger
#!/bin/bash
exit `curl -k -s https://localhost:8140 | grep '500 Internal Server Error' | wc -l`

Unfortunately the above gives me one of these in my syslog each minute, which is harmless yet still ugly:

Mar 5 10:21:42 cwt1 puppet-master[32167]: The environment must be purely alphanumeric, not ''

I'm interested in a puppetmaster monitoring solution which doesn't give me log oddities.

[Christopher Wood]

Finally got around to checking into this. I needed to actually read the rest api docs:

http://docs.puppetlabs.com/guides/rest_api.html

So:

#!/bin/bash
exit `curl -s --cacert /var/lib/puppet/ssl/certs/ca.pem https://puppet.mycompany.com:8140/production/certificate/ca | grep '500 Internal Server Error' | wc -l`

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